Method of cutting stencils



Oct. 28, 1941. D. L. BOYD 2,260,554

METHOD OF CUTTING STENCILS Original Filed March 6, 1940 [nuuuuuuu INVENTOR.

Dana/d L. Bog a w I ag W117 Ari M Patented Oct. 28, 1941 UNITED STATEMETHOD OF CUTTING STE-NCJLS Donald L. Boyd, Huntington, W. Vaassignorto- Carb-O-Spot Corporation, Athens, Ohio, a; corporation ofOhio Original application March 6, 1940, Serial No. 322,456. Divided andthis application October 15, 1940, Serial No. 361,215

4 Claims.

My invention relates more specifically to printing presses of the typedescribed in my copending application Serial No. 322,456, filed March 6,1940 of which this is a division.

That application describes a printing press designed to print spots ofwax carbon on sheets of paper through a belt stencil. The forms on whichthe spots are printed are superimposed on other forms having spots ofwax carbon printed in various other locations.

The object is to produce a form which although to top sheet will containa complete record of the entire transaction, only parts thereof will betransferred to the other sheets.

It will be .seen from this brief description that it is of vitalimportance that the spots are printed so as to ensure accurateregistration of the spots with the desired locations or the forms willbe worthless. In the application referred to above the paper is passedover an impression cylinder, and between it and a belt stencil. In thestencil are cut apertures of the various designs for the differentlylocated spots. Adjacent the edges of the belt stencil I provide a seriesof perforations or notches adapted to register with toothed wheels andin this manner I can obtain exact registration, and turn out an accuratepiece of work.

It will be obvious from the foregoing that an essential part of thestencil is to have the notches or perforations adjacent the edgecorrectly located in relation to the design to be cut in the stencil.

My invention has for its principal object to provide means for cuttingstencils which will ensure correct registration when the stencil is putto use on press.

My means for accomplishing the foregoing objects may be more readilyunderstood by having reference to the accompanying drawing, in which:

Fig. 1 is a perspective view of my improved means for cutting a stencil;

Fig. 2 is a detail view of the stencil without the design;

Fig. 3 is a detail view of the face of the female portion of the cuttingdie;

Fig. 4 is an edge view of the male portion of the cutting die; and

Fig. 5 is a'modified detail view of a stencil.

Similar reference numerals refer to similar parts throughout the entirespecification.

As shown'in the drawing, a cutting die 1, is provided with a punch 2 ofthe desired configuadapted to receive the punch 2, is combined with atemplate comprising a plurality of teeth 4, adapted to fit theperforations or notches 5, as the case may be which are punched adjacentor cut in the edges of the stencil. The design or central area and sideperforations may be simultaneously formed to prevent errors due toshrinkage in the stencil. These perforations 5 may be stamped or punchedin the stencil 6, by means of a cutting or stamping die of ordinaryconstruction. As illustrated it comprises a male portion 1, and punches8 corresponding to perforations 5, and the female portion 9.

A plurality of teeth 4 which correspond to the perforations 5 in theedge of the stencil 6 are formed adjacent the edge of the female part 3of the main die I. I have shown perforations adjacent the edges of thestencil, it will be obvious that these may be notches cut in the edgesof the stencil instead of perforations.

The operation is as follows, the cutting die 1, is placed in a suitablepress and the perforations or notches cut in the stencil paper.Preferably these perforations or notches should be one half inch fromcenter to center, as that is found to be most practical for the reasonthat most commercial work is in multiples of such units. The stencilpaper is then placed on the female part of the die I, and theperforations or notches 5 are fitted to the teeth 4, this serves to holdthe stencil paper in position while apertures of the required design arebeing punched.

The cutting die I is then locked in position on a suitable press (notshown), and the press is started cutting the first design Ill. Thestencil 6 is then moved forward the required number of punches and againfitted to the teeth 4, and the press is once more started, making thesecond design. This is repeated until the entire belt has been cut withthe requisite number of designs.

I have shown a certain design, but this is because it is a design whichI have printed on a quantity of tax forms. It should however, be obviousthat any desired design for the spots to be printed may be cutaccurately provided the notches 5 are first punched in the stencil 6,and a template having coinciding teeth is fastened to the female part 3of the die I.

Having described my invention, what I regard as new and desire to secureby Letters .Patent is:

1. The method of cutting a stencil comprising the following steps;forming a plurality of perforations having each one line as a side toestablish direction in stencil paper, preparing a temration. The femalepart 3 of the die, which is plate having a plurality of teeth, which areted to and coincide with said perforations, and then cutting outpredetermined areas from said stencil while it is held by said template.

2. The method of cutting a belt stencil comprising the following steps;forming a plurality of perforationsin stencil paper, preparing atemplate having a plurality of teeth, which are fitted to and coincidewith said perforations and then simultaneously cutting out predeterminedareasv from said stencil while it is held by said template." 3. Themethod of cutting a belt stencil comprising the following steps; forminga plurality of perforations in stencil paper 'adjacent*the;

edge and on one half inch centers, preparing a held by said template.

ing a plurality of teeth, which are fitted to and coincide with saidnotches and then cutting out predetermined areas from said stencil whileit is DONALD L. BOYD.

